71061261 has 4 divisors (see below), whose sum is σ = 94748352. Its totient is φ = 47374172.

The previous prime is 71061259. The next prime is 71061301. The reversal of 71061261 is 16216017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71061261 - 2¹ = 71061259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71061251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11843541 + ... + 11843546.

It is an arithmetic number, because the mean of its divisors is an integer number (23687088).

Almost surely, 2^71061261 is an apocalyptic number.

It is an amenable number.

71061261 is a deficient number, since it is larger than the sum of its proper divisors (23687091).

71061261 is a wasteful number, since it uses less digits than its factorization.

71061261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23687090.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 71061261 is about 8429.7841609379. The cubic root of 71061261 is about 414.2008349013.

Adding to 71061261 its reverse (16216017), we get a palindrome (87277278).

The spelling of 71061261 in words is "seventy-one million, sixty-one thousand, two hundred sixty-one".